/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef _D_BT_LEECHER_STATE_CHOKE_H_
#define _D_BT_LEECHER_STATE_CHOKE_H_

#include "common.h"

#include <deque>

#include "SharedHandle.h"
#include "TimeA2.h"

namespace aria2 {

class Peer;
class Logger;

class BtLeecherStateChoke {
private:
  int _round;

  Time _lastRound;

  Logger* _logger;

  class PeerEntry {
  private:
    SharedHandle<Peer> _peer;
    unsigned int _downloadSpeed;
    bool _regularUnchoker;
  public:
    PeerEntry(const SharedHandle<Peer>& peer, const struct timeval& now);

    bool operator<(const PeerEntry& rhs) const;

    const SharedHandle<Peer>& getPeer() const;

    unsigned int getDownloadSpeed() const;

    bool isRegularUnchoker() const;

    bool isSnubbing() const;

    void enableChokingRequired();

    void disableChokingRequired();

    void enableOptUnchoking();

    void disableOptUnchoking();
  };

  void plannedOptimisticUnchoke(std::deque<PeerEntry>& peerEntries);

  void regularUnchoke(std::deque<PeerEntry>& peerEntries);

  friend class PeerFilter;
  friend class BtLeecherStateChokeGenPeerEntry;
public:
  BtLeecherStateChoke();

  ~BtLeecherStateChoke();

  void executeChoke(const std::deque<SharedHandle<Peer> >& peerSet);

  const Time& getLastRound() const;
};

} // namespace aria2

#endif // _D_BT_LEECHER_STATE_CHOKE_H_